after a decade of lies lance armstrong admitted he used banned performance-enhancing drugs through all seven of his wins at the tour de france. the disgraced cyclist didn't tell all but he told a lot in an interview with oprah winfrey aired last night. we asked jim axelrod to look at where this leaves armstrong now. >> i view this situation as one big lie that i repeated a lot of times. as you said it wasn't as if i just said no and i moved off it. >> reporter: now that armstrong is no longer repeating the lie he may face a number of lawsuits that could decimate his estimated net worth of more than $100 million. the largest involves his long- time sponsor, the u.s. postal service. armstrong's postal service contract specifically banned doping. a lawsuit already has been filed by former teammate floyd landis that alleges armstrong defrauded the postal service and the federal government. the postal service paid armstrong more than $30 million. under the law, if fraud against the government is proven, the penalty could be triple, more than $90 million. one interested viewer of the intervi